Phase separation in the Hubbard model using the dynamical cluster approximation

2005/06/30 by A. Macridin, Alexandru Macridin, Mark Jarrell +3 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.74.085104

published as Phys. Rev. B 74, 085104 (2006) · accepted for publication in PRB

arxiv created 2006/06/26 · openalex publication_date 2006/08/01 · arxiv updated 2009/12/01 · openalex created_date 2020/06/05 · openalex updated_date 2026/07/30

Abstract

Phase separation in the Hubbard model is investigated with the dynamical cluster approximation. We find that it is present in the paramagnetic solution for values of filling smaller than 1 and at finite temperature when a positive next-nearest-neighbor hopping is considered. The phase-separated region is characterized by a mixture of a strongly correlated metallic and Mott insulating phases. Our results indicate that phase separation is driven by the formation of doped regions with strong antiferromagnetic correlations and low kinetic energy.

Citations

• A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2
• Doping dependence of chemical potential and entropy in hole- and electron-doped high-Tccuprates
• Physics of cuprates with the two-band Hubbard model: The validity of the one-band Hubbard model

Cited by

• Phase separation and competition of superconductivity and magnetism in the two-dimensional Hubbard model: From strong to weak coupling
• Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model